just:in mac includes example XML files which can be adapted to your needs:
StartUpXML: this folder contains the XML files which will be available in the Metadata section of the Inspector within Just Control.
ExportXML: this folder contains the XML files which will be used to create the output Sidecar XML files.
StartUpXML
This picture shows how the StartUpXML - “example.xml” will be displayed in Just Control.